Notice of Results

Date for release interim results

Inmarsat plc will report consolidated interim results for the 6 months ended 30 June 2012 on Friday, 3 August 2012 at 7:00am London time. Simultaneously Inmarsat Group Limited will report results for the 3 months ended 30 June 2012.

Inmarsat management will discuss the interim results and other financial and business information in a conference call on Friday, 3 August at 2.00pm London time. To access the call please dial +44 (0) 1452 555 566. The conference id for the call is 10246633. The call will be recorded and available for one week after the event. To access the recording, please dial +44 (0) 1452 55 00 00 and enter the access code 10246633#. The call will also be available via a webcast accessible through our website, www.inmarsat.com.